Math ch 4

1. statement that can be proven easily using the theorem
5. if three sides on both triangles are congruent to each other then both triangles are congruent
6. 1 right angle
7. uses arrows to show the flow of a logical argument
8. 1 obtuse angle
12. the sum of interior angles in a triangle is 180 degrees
13. 3 congruent sides
14. polygon with three sides
15. the orginal angles
16. when two figures have the exact shape and size
17. if two angles of one triangle are congruent to two angles of another triangle, then the third angles also congruent
19. 2 congruent sides
20. if two angles and the included side of one triangle are congruent to two angle and the included side of a second triangle, then the two triangles are congruent

2. if two angles and a non-included side of one triangle are congruent to two angles and the corresponding non-included side of a second triangle, then the two triangles are congruent
3. if two sides and the included angle of one triangle are congruent to two sides and the included angle of a 2nd triangle, then the two triangle are congruent
4. a transformation that preserves length, angle, measure, and area
9. a triangle with no congruent sides
10. if the hypotenuse and a leg of a right triangle are congruent to the leg and hypotenuse of the second triangle then the two triangle are congruent
11. the angles that form linear pairs with interior angles
18. 3 acute angles